GB797692A - Shields for nuclear reactors - Google Patents

Shields for nuclear reactors

Info

Publication number
GB797692A
GB797692A GB23340/55A GB2334055A GB797692A GB 797692 A GB797692 A GB 797692A GB 23340/55 A GB23340/55 A GB 23340/55A GB 2334055 A GB2334055 A GB 2334055A GB 797692 A GB797692 A GB 797692A
Authority
GB
United Kingdom
Prior art keywords
parts
mesh
moderating
per cent
borax
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB23340/55A
Inventor
Ivo Joseph Lockyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Morgan Crucible Co PLC
Original Assignee
Morgan Crucible Co PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Morgan Crucible Co PLC filed Critical Morgan Crucible Co PLC
Publication of GB797692A publication Critical patent/GB797692A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/30—Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/08—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records
    • G11B17/12—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis
    • G11B17/16—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with axial transfer to the turntable from a stack with a vertical axis by mechanism in stationary centre post, e.g. with stepped post, using fingers on post
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C11/00—Shielding structurally associated with the reactor
    • G21C11/02—Biological shielding ; Neutron or gamma shielding
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C11/00—Shielding structurally associated with the reactor
    • G21C11/02—Biological shielding ; Neutron or gamma shielding
    • G21C11/028—Biological shielding ; Neutron or gamma shielding characterised by the form or by the material
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C5/00—Moderator or core structure; Selection of materials for use as moderator
    • G21C5/12—Moderator or core structure; Selection of materials for use as moderator characterised by composition, e.g. the moderator containing additional substances which ensure improved heat resistance of the moderator
    • G21C5/126—Carbonic moderators
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G21F1/06—Ceramics; Glasses; Refractories
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G21F1/10—Organic substances; Dispersions in organic carriers
    • G21F1/103—Dispersions in organic carriers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Molecular Biology (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Ceramic Products (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Microwave Tubes (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Breakers (AREA)
  • Contacts (AREA)

Abstract

797,692. Moderating neutrons. MORGAN CRUCIBLE CO., Ltd. July 31, 1956 [Aug. 12, 1955], No. 23340/55. Class 39(4). A reactor shield for moderating and absorbing neutrons is made from a material comprising a boron compound dispersed in graphite. 50 parts of graphite dust finer than 100 mesh and 25 parts coarser than 50 mesh are mixed with 25 parts of pitch or tar and 30 parts of anhydrous borax, cooled, and then gristed or rolled. A block is formed by putting the material into a mould by increments, tamping each layer, then heating to about 1000‹C. to carbonize the binder and to melt the borax without decomposing or volatilizing it. Blocks of the material may be built up to form a wall around a reactor. Between “ per cent and 10 per cent by weight of boron is required for shielding, but less is required to attenuate neutron flux.
GB23340/55A 1955-08-12 1955-08-12 Shields for nuclear reactors Expired GB797692A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB339994X 1955-08-12
GB345043X 1955-09-23
GB334124X 1955-10-25
GB310756X 1956-07-31

Publications (1)

Publication Number Publication Date
GB797692A true GB797692A (en) 1958-07-09

Family

ID=27448799

Family Applications (4)

Application Number Title Priority Date Filing Date
GB23340/55A Expired GB797692A (en) 1955-08-12 1955-08-12 Shields for nuclear reactors
GB27225/55A Expired GB810098A (en) 1955-08-12 1955-09-23 Improvements relating to electric contact spring assemblies
GB30462/55A Expired GB802876A (en) 1955-08-12 1955-10-25 Improvements in or relating to travelling wave amplifier tubes
GB676/58A Expired GB821915A (en) 1955-08-12 1958-01-07 Shields for nuclear reactors

Family Applications After (3)

Application Number Title Priority Date Filing Date
GB27225/55A Expired GB810098A (en) 1955-08-12 1955-09-23 Improvements relating to electric contact spring assemblies
GB30462/55A Expired GB802876A (en) 1955-08-12 1955-10-25 Improvements in or relating to travelling wave amplifier tubes
GB676/58A Expired GB821915A (en) 1955-08-12 1958-01-07 Shields for nuclear reactors

Country Status (8)

Country Link
US (1) US2882441A (en)
BE (1) BE550196A (en)
CH (3) CH339994A (en)
DE (1) DE1043534B (en)
FR (3) FR1160723A (en)
GB (4) GB797692A (en)
LU (1) LU34572A1 (en)
NL (3) NL103284C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3231521A (en) * 1961-05-24 1966-01-25 Carborundum Co Neutron shielding using a composition comprising graphite, boron carbide and carbonized residue
FR2121622A1 (en) * 1971-01-07 1972-08-25 British Nuclear Design Constr
DE2752040A1 (en) * 1977-11-22 1979-05-23 Kempten Elektroschmelz Gmbh NEUTRON ABSORBER PLATES BASED ON BORON CARBIDE AND CARBON AND THE PROCESS FOR THEIR PRODUCTION

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967968A (en) * 1957-06-24 1961-01-10 Gen Electric Electron discharge device
DE1178527B (en) * 1959-11-24 1964-09-24 Licentia Gmbh Nuclear reactor shield
US3324342A (en) * 1963-07-12 1967-06-06 Varian Associates Traveling wave tube having maximum gain and power output at the same beam voltage
US4074211A (en) * 1976-09-07 1978-02-14 The United States Of America As Represented By The Secretary Of The Army Dielectric substrate for slow-wave structure
GB2296370B (en) * 1994-12-19 1998-07-29 Eev Ltd Travelling wave tubes
FR2995360B1 (en) 2012-09-12 2018-06-15 Snecma METHOD FOR MOUNTING AN ACOUSTIC PANEL IN A HOUSING OF A TURBOMACHINE AND TURBOMACHINE COMPRISING AN ACOUSTIC PANEL

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE913000C (en) * 1943-07-08 1954-06-08 Dr Boris Rajewsky Component or component for protection against neutron and ª † radiation
NL73832C (en) * 1946-10-22
US2584597A (en) * 1949-01-26 1952-02-05 Sylvania Electric Prod Traveling wave tube
GB764681A (en) * 1952-01-01 1957-01-02 Mullard Radio Valve Co Ltd Improvements in travelling wave tubes
FR1060245A (en) * 1952-07-15 1954-03-31 Centre Nat Rech Scient Material absorbing radiation of nuclear origin and in particular neutron radiation
US2771565A (en) * 1952-08-19 1956-11-20 Itt Traveling wave tubes
BE517667A (en) * 1953-02-14
US2752430A (en) * 1954-03-11 1956-06-26 Hughes Aircraft Co Traveling-wave tube automatic gain control
BE557951A (en) * 1954-10-29

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3231521A (en) * 1961-05-24 1966-01-25 Carborundum Co Neutron shielding using a composition comprising graphite, boron carbide and carbonized residue
FR2121622A1 (en) * 1971-01-07 1972-08-25 British Nuclear Design Constr
DE2752040A1 (en) * 1977-11-22 1979-05-23 Kempten Elektroschmelz Gmbh NEUTRON ABSORBER PLATES BASED ON BORON CARBIDE AND CARBON AND THE PROCESS FOR THEIR PRODUCTION
FR2409582A1 (en) * 1977-11-22 1979-06-15 Kempten Elektroschmelz Gmbh NEUTRON-ABSORBING PLATES, BASED ON BORON AND CARBON CARBIDE, AND PROCESS FOR MAKING THEM

Also Published As

Publication number Publication date
US2882441A (en) 1959-04-14
NL209604A (en)
CH345043A (en) 1960-03-15
GB810098A (en) 1959-03-11
FR1160723A (en) 1958-07-29
CH334124A (en) 1958-11-15
GB821915A (en) 1959-10-14
LU34572A1 (en)
GB802876A (en) 1958-10-15
NL103284C (en)
FR1156297A (en) 1958-05-14
DE1043534B (en) 1958-11-13
BE550196A (en)
CH339994A (en) 1959-07-31
NL211372A (en)
FR1159105A (en) 1958-06-23

Similar Documents

Publication Publication Date Title
US2796411A (en) Radiation shield
US2727996A (en) Thermal neutron shield and method for making same
GB797692A (en) Shields for nuclear reactors
GB804902A (en) Neutron shielding material
GB1169322A (en) Process for Making Graphitic Neutron Absorbing Articles
GB792114A (en) Improvements in or relating to nuclear reactors
GB1386689A (en) Control member for a nuclear reactor
GB980759A (en) Forgeable corrosion-resistant and neutron absorbent steel
CN112863721A (en) Uranium-based neutron gamma composite shielding material
US3203906A (en) Bituminous shielding composition
GB755242A (en) Improvements relating to means for protecting human beings and animals against the biological injuries caused by radiation
GB751700A (en) Nuclear reactor
GB1056950A (en) Control elements for fast nuclear reactors
GB1005196A (en) Radiation shielding material
GB958088A (en) Improvements in or relating to fast nuclear reactors
GB836147A (en) Improvements in or relating to shielding for nuclear reactors
US2976227A (en) Neutronic reactor
GB1199051A (en) Improvements in or relating to Nuclear Reactor Fuel Elements
US3053776A (en) Radiation shielding materials
GB882031A (en) Improvements relating to radiation shielding for nuclear equipment
GB1291721A (en) Improvements in nuclear reactors
GB614156A (en) Apparatus for the production of energy by nuclear fission
GB1182588A (en) Nuclear Reactor Structure
GB801288A (en) Fuel for nuclear reactors and process of making the same
GB822163A (en) Improvements in or relating to organic reactors